/* ============================================================
   Lacléastro — Feuille de style principale
   Palette : lavande douce + violet profond + or
   ============================================================ */

:root {
  --bg:           #f4f0fa;
  --card:         #ffffff;
  --line:         #e2d8f4;
  --text:         #1c1130;
  --muted:        #6e5e8a;
  --accent:       #6535c5;
  --accent-dark:  #42208a;
  --accent-soft:  #c1adec;
  --gold:         #b8842e;
  --gold-light:   #fdf0d8;
  --danger-bg:    #fdf0ef;
  --danger-border:#e8a098;
  --danger-text:  #8b2d26;
  --radius:       16px;
  --shadow:       0 4px 20px rgba(70, 30, 140, 0.10);
  --shadow-sm:    0 2px 8px  rgba(70, 30, 140, 0.07);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ---- Barre du haut ---- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 14px 24px;
  background: var(--card);
  box-shadow: 0 2px 12px rgba(70, 30, 140, 0.09);
  position: sticky;
  top: 0;
  z-index: 100;
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo-badge {
  width: 50px; height: 50px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 10px rgba(101, 53, 197, 0.22);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}
.logo { width: 42px; height: 42px; object-fit: contain; display: block; }
.brand-text h1 {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent-dark);
  letter-spacing: 0.3px;
}
.brand-text p {
  margin: 2px 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}

/* ---- Onglets navigation ---- */
.tabs { display: flex; gap: 8px; }
.tab {
  cursor: pointer;
  border: 1.5px solid var(--line);
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 8px 18px;
  font-size: 0.87rem;
  font-weight: 600;
  transition: all 0.18s ease;
  white-space: nowrap;
}
.tab:hover { border-color: var(--accent-soft); color: var(--accent); }
.tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 3px 10px rgba(101, 53, 197, 0.30);
}

/* ---- Mise en page principale ---- */
main {
  max-width: 740px;
  margin: 0 auto;
  padding: 24px 16px 48px;
}

/* ---- Cartes ---- */
.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}
.card h2 {
  margin: 0 0 20px;
  font-size: 1.25rem;
  color: var(--accent-dark);
  display: flex;
  align-items: center;
  gap: 10px;
}
.card h2::before {
  content: "";
  display: inline-block;
  width: 4px; height: 22px;
  background: linear-gradient(180deg, var(--accent), var(--accent-soft));
  border-radius: 4px;
  flex-shrink: 0;
}
.card h3 {
  color: var(--accent);
  margin: 24px 0 12px;
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

/* ---- Formulaire ---- */
label {
  display: block;
  margin: 18px 0 6px;
  font-weight: 600;
  font-size: 0.88rem;
  color: var(--text);
}
input[type="text"],
input[type="date"] {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--line);
  border-radius: 10px;
  font-size: 0.97rem;
  background: #faf8ff;
  color: var(--text);
  transition: border-color 0.18s;
}
input:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(101, 53, 197, 0.12);
}

fieldset.conservation {
  margin-top: 20px;
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  background: #faf8ff;
}
fieldset.conservation legend {
  font-weight: 700;
  font-size: 0.88rem;
  padding: 0 8px;
  color: var(--accent);
}
label.radio {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 400;
  font-size: 0.92rem;
  margin: 10px 0;
  cursor: pointer;
}
label.radio input[type="radio"] {
  width: 18px; height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
}

/* ---- Boutons ---- */
.btn-primary {
  width: 100%;
  margin-top: 24px;
  padding: 14px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.3px;
  box-shadow: 0 4px 14px rgba(101, 53, 197, 0.35);
  transition: filter 0.18s, transform 0.12s;
}
.btn-primary:hover  { filter: brightness(1.08); }
.btn-primary:active { transform: scale(0.98); }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.btn-secondary {
  flex: 1 1 140px;
  padding: 11px 16px;
  background: var(--bg);
  border: 1.5px solid var(--line);
  border-radius: 10px;
  color: var(--accent-dark);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}
.btn-secondary:hover {
  background: var(--card);
  border-color: var(--accent-soft);
}

.btn-link {
  background: none;
  border: none;
  color: var(--accent);
  text-decoration: none;
  padding: 12px 0 0;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  display: inline-block;
}
.btn-link:hover { text-decoration: underline; }

/* ---- Utilitaires ---- */
.hidden { display: none !important; }

/* ---- Bannière d'erreur ---- */
.error-banner {
  background: var(--danger-bg);
  border: 1.5px solid var(--danger-border);
  color: var(--danger-text);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 16px;
  font-size: 0.9rem;
  font-weight: 500;
}

/* ---- Résultats : grille des chiffres principaux ---- */
.summary {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}
.summary .item {
  background: linear-gradient(145deg, #f0ebfc, #e8e0f8);
  border-radius: 14px;
  padding: 14px 10px;
  text-align: center;
  border: 1px solid var(--line);
}
.summary .item .value {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.1;
  display: block;
}
.summary .item .label {
  font-size: 0.72rem;
  color: var(--muted);
  margin-top: 4px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  display: block;
}

/* ---- Détails des calculs ---- */
.details { margin-bottom: 16px; }
.detail-row {
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.detail-row:last-child { border-bottom: none; }
.detail-row .titre {
  font-weight: 700;
  color: var(--text);
  font-size: 0.95rem;
}
.detail-row .resultat {
  font-weight: 800;
  color: var(--accent);
  font-size: 1.1rem;
  margin-left: 4px;
}
.detail-row .operation {
  font-family: "SFMono-Regular", Consolas, Menlo, monospace;
  font-size: 0.82rem;
  color: var(--muted);
  background: #f5f1fb;
  border-radius: 6px;
  padding: 6px 10px;
  margin: 6px 0;
  display: block;
  overflow-x: auto;
}
.detail-row .texte {
  font-size: 0.91rem;
  color: var(--text);
  margin-top: 4px;
  line-height: 1.5;
}

/* ---- Bouton "Comprendre ce calcul" ---- */
.btn-comprendre {
  margin-top: 8px;
  background: none;
  border: 1.5px solid var(--accent-soft);
  color: var(--accent);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-comprendre:hover { background: var(--bg); }
.explication {
  margin-top: 10px;
  background: var(--gold-light);
  border-left: 3px solid var(--gold);
  border-radius: 0 10px 10px 0;
  padding: 12px 14px;
  font-size: 0.88rem;
  color: var(--text);
}
.explication p { margin: 6px 0; }
.explication .expl-courte { font-weight: 700; color: var(--accent-dark); }
.explication .expl-formule { font-style: italic; color: var(--muted); }

/* ---- Mots-clés ---- */
.keywords {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}
.keywords span {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 0.82rem;
  font-weight: 600;
}

/* ---- Texte copiable / synthèse ---- */
.text-block {
  background: #faf8ff;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  white-space: pre-wrap;
  font-size: 0.91rem;
  line-height: 1.65;
  color: var(--text);
}

/* ---- Statut sauvegarde ---- */
.save-status {
  font-size: 0.85rem;
  color: var(--accent);
  min-height: 1.4em;
  margin-top: 8px;
  font-weight: 500;
}

/* ---- Favoris ---- */
.favorites-list .fav-item {
  border: 1.5px solid var(--line);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  background: var(--card);
  box-shadow: var(--shadow-sm);
}
.favorites-list .fav-name {
  font-weight: 700;
  font-size: 0.97rem;
  color: var(--text);
}
.favorites-list .fav-date {
  font-size: 0.78rem;
  color: var(--muted);
  margin-top: 3px;
}
.fav-actions { display: flex; gap: 8px; flex-shrink: 0; }
.fav-actions button {
  background: none;
  border: 1.5px solid var(--line);
  border-radius: 8px;
  color: var(--accent);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 5px 10px;
  transition: background 0.15s;
}
.fav-actions button:hover { background: var(--bg); }
.fav-actions .btn-del { color: var(--danger-text); border-color: var(--danger-border); }
.fav-actions .btn-del:hover { background: var(--danger-bg); }

.empty { color: var(--muted); font-style: italic; font-size: 0.92rem; }

/* ---- Responsive mobile ---- */
@media (max-width: 500px) {
  .topbar { padding: 12px 16px; }
  .brand-text h1 { font-size: 1.15rem; }
  .card { padding: 18px 16px; }
  main { padding: 16px 10px 40px; }
  .summary .item .value { font-size: 1.7rem; }
  .tabs .tab { padding: 7px 14px; font-size: 0.82rem; }
}